瑞华技术：关于取得发明专利证书的公告

Core Viewpoint - Ruihua Technology has received a patent for a method of preparing high-impact polystyrene, indicating potential advancements in their product offerings and market position [2] Company Summary - On November 29, 2025, Ruihua Technology was granted a patent by the Russian Federal Intellectual Property Office for an invention titled "Method for Preparing High-Impact Polystyrene and High-Impact Polystyrene" [2] - The patent number is RU 2851287, and the patent rights are held by Changzhou Ruihua Chemical Engineering Technology Co., Ltd. [2] - The announcement of the patent grant was made on November 21, 2025 [2]